Failed to dispatch event 'MicrophonePacketEvent'

[Ganboo]

When attempting to use the mod for broadcasts I get the below error:

[02:14:33] [VoiceChatPacketProcessingThread/ERROR]: [voicechat] Failed to dispatch event 'MicrophonePacketEvent'
java.lang.NoClassDefFoundError: net/minecraft/server/level/ServerPlayer
	at knot/com.lucasmellof.broadcastvoice.BroadcastVoicePlugin.onVoicePacket(BroadcastVoicePlugin.java:32) ~[simple_voice_broadcast-fabric-1.21.1-1.0.0-dev.jar:?]
	at knot/de.maxhenkel.voicechat.plugins.PluginManager.dispatchEvent(PluginManager.java:142) [voicechat-fabric-1.21.1-2.6.12.jar:?]
	at knot/de.maxhenkel.voicechat.plugins.PluginManager.onMicPacket(PluginManager.java:242) [voicechat-fabric-1.21.1-2.6.12.jar:?]
	at knot/de.maxhenkel.voicechat.voice.server.Server.onMicPacket(Server.java:367) [voicechat-fabric-1.21.1-2.6.12.jar:?]
	at knot/de.maxhenkel.voicechat.voice.server.Server$ProcessThread.run(Server.java:335) [voicechat-fabric-1.21.1-2.6.12.jar:?]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.level.ServerPlayer

Minecraft 1.21.1 with Fabric Loader 0.18.4
VoiceChat version: voicechat-fabric-1.21.1-2.6.12.jar